A census statistic is a numerical value that is collected by a government to measure the POPULATION of a certain area. The three-letter term for this statistic is AGE, which stands for the AGE of the POPULATION. The ten-letter term for this statistic is POPULATION, which is the total number of people in a certain area. The seven-letter term for this statistic is MEANAGE, which is the average AGE of the POPULATION. The nine-letter term for this statistic is MEDIANAGE, which is the middle AGE of the POPULATION.